空间环境对聚合物基复合材料性能的影响分析

文章介绍了空间飞行器工作过程中的空间环境条件。为满足这些要求 ,在设计与选材时须考虑一些因素。此外对某型号任务中使用的P75S/环氧 6 48复合材料耐空间环境条件的性能做了简要评述     

空间——建筑与环境设计的主角

本文主要引用外国建筑中的一些实例，对空间与环境、人的心理精神的需求、结构、尺寸、材料及时间等因素这间关系进行论证，从中学习建筑大师是如何认识空间、创造空间，利用空间满足人的需求的经验和方法，从中理解空间在建筑与环境中的重要性、所占的地位及所起的作用。     

Simultaneous observations of the plasma density on the same field line by the CPMN ground magnetometers and the Cluster satellites

By applying the cross-phase method and the amplitude-ratio method to magnetic field data obtained from two ground stations located close to each other, we can determine the frequency of the field line resonance (FLR), or the field line eigenfrequency, for the field line running through the midpoint of the two stations. From thus identified FLR frequency we can estimate the equatorial plasma mass density (ρ)$(\rho )$ by using the T05s magnetospheric field model [Tsyganenko, N.A., Sitnov, M.I. Modeling the dynamics of the inner magnetosphere during strong geomagnetic storms, J. Geophys. Res. 110, A03208, 2005] and the equation of Singer et al. [Singer, H.J., Southwood, D.J., Walker, R.J., Kivelson, M.G. Alfven wave resonances in a realistic magnetospheric magnetic field geometry, J. Geophys. Res. 86 (A6) 4589–4596, 1981].     

空间环境下的三维运动模拟器设计与应用研究

文章通过对空间环境下三维运动实现方法的分析研究,引出三维运动模拟器的设计概念,三维运动模拟器是实现空间环境下三维运动功能的装置,其运动功能包含自旋、俯仰和偏航以及三维合成运动。文章对三维运动模拟器主体结构以及驱动系统等的技术指标、功能、选型计算、系统组成和特点进行了介绍,对研制过程中的重要技术问题进行了分析。     

可视化系统建模语言及其在MIS开发中的应用

介绍了VSML(Visual System Modeling Language)的描述内容及其原语定义和行为描述,并对新完善的数据库信息处理功能进行了介绍;接着对完善后的VSML的体系结构及其功能进行了较详细的描述;然后以商业管理采购员订货系统模型作为实例,介绍了VSML的应用,最后对VSML及其进一步的研究工作进行了小结.     

Model-based robustness testing for avionics-embedded software

Robustness testing for safety-critical embedded software is still a challenge in its nascent stages. In this paper, we propose a practical methodology and implement an environment by employing model-based robustness testing for embedded software systems. It is a system-level black-box testing approach in which the fault behaviors of embedded software is triggered with the aid of modelbased fault injection by the support of an executable model-driven hardware-in-loop (HIL) testing environment. The prototype implementation of the robustness testing environment based on the proposed approach is experimentally discussed and illustrated by industrial case studies based on several avionics-embedded software systems. The results show that our proposed and implemented robustness testing method and environment are effective to find more bugs, and reduce burdens of testing engineers to enhance efficiency of testing tasks, especially for testing complex embedded systems.     

A mars communication constellation for human exploration and network science

This paper analyses the possibility of exploiting a small spacecrafts constellation around Mars to ensure a complete and continuous coverage of the planet, for the purpose of supporting future human and robotic operations and taking advantage of optical transmission techniques. The study foresees such a communications mission to be implemented at least after 2020 and a high data-rate requirement is imposed for the return of huge scientific data from massive robotic exploration or to allow video transmissions from a possible human outpost.     

Single-event upset in geostationary transfer orbit during solar-activity maximum period measured by the Tsubasa satellite

This paper reports single-event upset (SEU) occurrence related to the space radiation environment in geostationary transfer orbit during solar-activity maximum period measured by the Tsubasa satellite. Most SEUs are measured in the inner radiation belt, indicating that they are mainly caused by trapped protons. Thus, the spatial distribution and the temporal variation of the SEU count correlate well with those of trapped protons. The peak SEU rate appears around L = 1.4. The transition point from SEUs caused by trapped protons to those caused by galactic cosmic rays is around L = 2.6. During the experiment period, increased SEU count was sometimes detected due to solar and geomagnetic events outside the inner radiation belt.     

基于信息化建设的产品合同精益管理

介绍了大型军工企业产品合同信息的创新管理，即运用创新管理理念，通过园区网，应用数据库和软件开发及网络技术实现了产品合同信息的网络数字化管理，包括合同内容、合同履行情况、付款情况等方面的过程管理，通过网络实现合同信息的快速查询、产品生产的过程监控、合同款管理的办公自动化，提升了企业产品合同管理的精益化管理。     

Correlation between the cosmic noise absorption calculated from the SARINET data and the energetic particles measured by MEPED: Simultaneous observations over SAMA region

The cosmic noise absorption is presented in terms of two-dimensional images obtained from the imaging riometers operated at the Southern Space Observatory (geographic coordinate: 29.4° S, 53.1° W), in São Martinho da Serra, Brazil, Concepcion (geographic coordinate: 36.5° S, 73.0° W) and Punta Arenas (geographic coordinate: 53.0° S, 70.5° W) in Chile, which belong to the South American Riometer Network and are located at the central and periphery regions of the South American Magnetic Anomaly. Correlations are performed between the maximum cosmic noise absorption observed at these stations and the energetic electron flux in two energy channels (>30 and >300 keV) and the proton flux in three energy channels (80–240, 800–2500 and >6900 keV) as measured by the Medium Energy Proton and Electron Detector, during a moderate geomagnetic storm that occurred on September 3, 2008. The results show high correlations between the cosmic noise absorption detected at São Martinho da Serra and the flux of protons with energy between 80 and 240 keV, and the flux of electrons with energies higher than 300 keV, while an additional ionization at Concepcion was correlated with electrons of energies higher than 30 keV. The cosmic noise absorption detected at Punta Arenas was probably caused by the increase of the protons flux with energy between 80 and 240 keV.